Found 9321 Articles for Object Oriented Programming

Flatten array to 1 line in JavaScript

AmitDiwan
Updated on 21-Nov-2020 10:41:58

159 Views

Suppose, we have a nested array of numbers like this −const arr = [    [ 0, 0, 0, −8.5, 28, 8.5 ],    [ 1, 1, −3, 0, 3, 12 ],    [ 2, 2, −0.5, 0, 0.5, 5.3 ] ];We are required to write a JavaScript function that takes in one such nested array of numbers. The function should combine all the numbers in the nested array to form a single string.In the resulting string, the adjacent numbers should be separated by a whitespaces and elements of two adjacent arrays should be separated by a comma.ExampleThe code for ... Read More

Flat array of objects to tree in JavaScript

AmitDiwan
Updated on 21-Nov-2020 10:40:52

553 Views

Suppose, we have an array of objects like this −const arr = [    { id: '1', name: 'name 1', parentId: null },    { id: '2', name: 'name 2', parentId: null },    { id: '2_1', name: 'name 2_1', parentId: '2' },    { id: '2_2', name: 'name 2_2', parentId: '2' },    { id: '3', name: 'name 3', parentId: null },    { id: '4', name: 'name 4', parentId: null },    { id: '5', name: 'name 5', parentId: null },    { id: '6', name: 'name 6', parentId: null },    { id: '7', name: 'name 7', ... Read More

JavaScript to Calculate the nth root of a number

AmitDiwan
Updated on 21-Nov-2020 10:36:32

137 Views

We are required to write a JavaScript function that calculates the nth root of a number and returns it.ExampleThe code for this will be −const findNthRoot = (m, n) => {    try {       let negate = n % 2 == 1 && m < 0;       if(negate)          m = −m;       let possible = Math.pow(m, 1 / n);       n = Math.pow(possible, n);       if(Math.abs(m − n) < 1 && (m > 0 == n > 0))       return negate ? −possible : possible;    } catch(e){       return null;    } }; console.log(findNthRoot(45, 6));OutputAnd the output in the console will be −1.8859727740585395

Sorting an array objects by property having null value in JavaScript

Sakshi Jain
Updated on 21-Aug-2023 17:25:38

3K+ Views

The problem statement says to perform sorting of an array of objects taking in one specific condition to sort null value key pairs present in the array of objects to be pushed at the end of the array where the array of objects is given by the user as an input source. What is an Array in JavaScript ? If you are familiar with any other programming language like C, C++, or Java, you must have heard the term 'array.' In programming, an array is a collection of similar data elements under one roof. Now, an important question ... Read More

Convert array of objects to an object of arrays in JavaScript

Sakshi Jain
Updated on 21-Aug-2023 16:20:00

343 Views

The problem statement says to perform a complete conversion of array of objects into an object of arrays in JavaScript where array of objects are given as an input source by the user and given input can be totally converted into the resultant object of arrays successfully. What is an array in JavaScript ? If you are familiar with any other programming language like C, C++, or Java, you must have heard the term 'array.' In programming, an array is a collection of similar data elements under one roof. Now, an important question arises: if arrays are generally the ... Read More

Partition N where the count of parts and each part are a power of 2, and part size and count are restricted in JavaScript

AmitDiwan
Updated on 21-Nov-2020 10:34:35

78 Views

We are required to write a JavaScript function that takes in a number. The function should divide the number into chunks according to the following rules −The number of chunks should be a power−of−two, Each chunk should also have a power-of-two number of items (where size goes up to a max power of two, so 1, 2, 4, 8, 16, 32, 32 being the max)Therefore, for example, 8 could be divided into 1 bucket −[8]9 could be −[8, 1]That works because both numbers are powers of two, and the size of the array is 2 (also a power of two).Let's ... Read More

Check how many objects are in the array with the same key in JavaScript

AmitDiwan
Updated on 21-Nov-2020 10:33:23

1K+ Views

Suppose, we have an array of objects containing some data about some users like this −const arr = [    {       "name":"aaa",       "id":"2100",       "designation":"developer"    },    {       "name":"bbb",       "id":"8888",       "designation":"team lead"    },    {       "name":"ccc",       "id":"6745",       "designation":"manager"    },    {       "name":"aaa",       "id":"9899",       "designation":"sw"    } ];We are required to write a JavaScript function that takes in one such array. Then our ... Read More

Smallest Common Multiple of an array of numbers in JavaScript

AmitDiwan
Updated on 21-Nov-2020 10:32:20

287 Views

Suppose, we have an array of two numbers that specify a range. We are required to write a function that finds the smallest common multiple of the provided parameters that can be evenly divided by both, as well as by all sequential numbers in the range between these parameters.The range will be an array of two numbers that will not necessarily be in numerical order.For example, if given [1, 3], then we are required to find the smallest common multiple of both 1 and 3 that is also evenly divisible by all numbers between 1 and 3. The answer here ... Read More

Regroup JSON array in JavaScript

AmitDiwan
Updated on 21-Nov-2020 10:31:59

237 Views

Suppose, we have a JSON array of objects like this −const arr = [    {       "id": "03868185",       "month_10": 6,    },    {       "id": "03870584",       "month_6": 2,    },    {       "id": "03870584",       "month_7": 5,    },    {       "id": "51295",       "month_1": 1,    },    {       "id": "51295",       "month_10": 1,    },    {       "id": "55468",       "month_11": 1,    } ];Here, we ... Read More

How to merge two arrays with objects in one in JavaScript?

AmitDiwan
Updated on 21-Nov-2020 10:30:11

909 Views

Suppose, we have two arrays of objects like these −const arr1 = [    {name:'test', lastname: 'test', gender:'f'},    {name:'test1', lastname: 'test1', gender:'f'},    {name:'test2', lastname: 'test2', gender:'m'} ]; const arr2 = [    {name:'test21', lastname: 'test21', gender:'f'},    {name:'test1', lastname: 'test1', gender:'f'},    {name:'test2', lastname: 'test2', gender:'m'},    {name:'test22', lastname: 'test22', gender:'m'} ];These arrays do not have any repeating objects within (repeating on the basis of 'name' property) but there exist some objects with repeating names in the first and second objects.We are required to write a JavaScript function that takes two such arrays and returns a new array.The ... Read More

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